Oral Sex & Infection

Yes—oral sex can cause infections. It’s not “risk-free,” even though many people assume it is.

Here’s how it works:

Sexually transmitted infections (STIs)/Oral sex can spread infections from mouth ↔ genitals, including:

• Herpes simplex virus (cold sores/genital herpes)
• Human papillomavirus (can affect throat or genitals)
• Gonorrhea (can infect the throat)
• Chlamydia (less common but possible in throat)
• Syphilis

Other infections

• Bacteria from the mouth can enter the genitals and cause irritation or infections
• Yeast infections can sometimes be triggered or worsened
• If someone has cuts, gum disease, or sores, the risk increases

Higher risk if:

• There are mouth sores, bleeding gums, or ulcers
• The partner has an untreated infection
• There’s no protection (like condoms or dental dams)

 How to reduce risk

• Avoid oral sex if either person has sores or symptoms
• Use protection (condoms/dental dams)
• Maintain good oral hygiene (but avoid brushing right before—it can cause tiny cuts)

Bottom line

Oral sex is generally lower risk than penetrative sex, but it’s not completely safe. Infections can still be transmitted.